塔里木盆地英买力地区三叠系相对湖平面变化分析  

Discussion on Relative Lacustrine Level Changes of Triassic in Yingmaili Area,Tarim Basin

作　　者：陈兆芹 刘景彦[1] 杨宪章[2] 罗彩明[2] 董火祥 CHEN Zhaoqin;LIU Jingyan;YANG Xianzhang;LUO Caiming;DONG Huoxiang(College of Energy Resource,China University of Geosciences(Beijing),Beijing 100083,China;Tarim Oilfield Company,PetroChina,Korla 841000,Xinjiang,China)

机构地区：[1]中国地质大学(北京)能源学院,北京100083 [2]中国石油塔里木油田分公司,新疆库尔勒841000

出　　处：《西北地质》2023年第1期203-216,共14页Northwestern Geology

基　　金：国家自然科学基金企业创新发展联合基金项目(U19B6003-01-01)。

摘　　要：以塔里木盆地英买力地区三叠系为研究对象,综合岩心、测井曲线等多种资料,将传统高分辨率层序定性识别与小波变换定量分析的方法相结合,对其进行层序单元定量划分,共划分出长期层序5个、中期层序13个、短期层序53个及超短期层序256个;基于超短期旋回绘制Fischer图解,结果显示三叠系相对湖平面呈现湖退到湖侵的过程,在SQ4时期湖平面上升至最高点,内部次一级的湖侵湖退过程与长期旋回相互对应。通过综合对比分析,发现随湖平面的升降变化,沉积相带呈现辫状河三角洲前缘近端、远端与滨浅湖沉积交替演变的特征。笔者研究弄清了英买力地区三叠系湖平面升降规律及其与沉积相带的演化关系,为后续地质研究提供了基础依据。Taking the Triassic in the Yingmaili area of Tarim Basin as an example,it combined with the tradi-tional qualitative identification of high-resolution sequence and quantitative analysis method of wavelet trans-form.The sequence division of Triassic in Yingmaili area of Tarim Basin was done by using the data of logging,drilling and core,and the Fischer plots was drawn based on the calculation of super short-term sequence cycles.It turns out the law that the relative lacustrine level changes were integrally from a long-time lacustrine regres-sion to a long time lacustrine transgressive and rose the largest during the SQ4.The complete lacustrine trans-gressive and lacustrine regression of Triassic was corresponded well to the long-term sequence cycles.Com-pared with integrated analysis,we find the lacustrine level changes is closely related with vertical evolution of sedimentary facies.This study clarifies the law of lake level changes of Triassic in Yingmaili area and its evolu-tion relationship with sedimentary facies belt,which provides a basic basis for subsequent geological research.

关 键 词：相对湖平面变化 Fischer图解 高分辨率层序地层学 三叠系 英买力地区 塔里木盆地 

分 类 号：P539.2[天文地球—古生物学与地层学]